Heel sole



FIG. 1 is a bottom perspective view of a heel sole showing my new design;

FIG. 2 is a top perspective view of the heel sole;

FIG. 3 is a front elevational view of the heel sole;

FIG. 4 is a rear elevational view of the heel sole;

FIG. 5 is a top plan view of the heel sole;

FIG. 6 is a bottom plan view of the heel sole;

FIG. 7 is a right side elevational view of the heel sole; and

FIG. 8 is a left side elevational view of the heel sole.

The broken line showing of an athletic shoe in FIGS. 1 and 2 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a heel sole, as shown and described. 